Malicious PDF — malware analysis report

Static analysis result for SHA-256 718d9c593a4b32f9…

MALICIOUS

PDF

89.2 KB Created: 2020-07-09 11:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6935454652ba7e0bfa02f859fb12e9c6 SHA-1: 1b92632ef96376deda86d721783eb43658ddcd8c SHA-256: 718d9c593a4b32f90904a2d050adf6b7db5bf0f321dd0b8c267d2076cb3c7342
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, including one identified as a malicious redirector. The document body, while heavily obfuscated, contains a URL that appears to be part of a link farm designed to drive traffic to other sites. This suggests the primary purpose is to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=edouard+louis+en+finir+avec+eddy+bellegueule+pdf
    • http://files.nicktillia.com/uploads/1/3/0/8/130874055/jivunu_furarosabizakox_boneg_benipudogisiwut.pdf
    • http://files.northcotejets.org/uploads/1/3/1/8/131871720/2786051.pdf
    • http://files.kimajgoldsmith.com/uploads/1/3/1/6/131637092/6017745.pdf
    • http://files.ronnieroseband.com/uploads/1/3/0/8/130813797/a7f99.pdf
    • http://files.millbrookrotarydirectory.com/uploads/1/3/0/7/130775846/d99ea.pdf
    • http://files.greenadaptations.net/uploads/1/3/1/3/131380720/3163792.pdf
    • http://files.kungfuabq.com/uploads/1/3/2/7/132711965/9288185.pdf
    • http://files.vonderhauswulfgermanshepherd.com/uploads/1/3/0/8/130813797/fivepeno.pdf
    • http://files.wrighteousbeagles.com/uploads/1/3/1/1/131164472/mamofufugozobas_gonivobus.pdf
    • http://files.goldenfleecefarm.com/uploads/1/3/0/9/130969004/detevi.pdf
    • http://files.treblemakers.ie/uploads/1/3/1/4/131438024/tukexotodok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://febasijila.files.wordpress.com/2020/06/53798034419.pdf
    • https://dozuwezixuw.files.wordpress.com/2020/06/xibazelebipi.pdf
    • https://libujidi.files.wordpress.com/2020/07/sajekojoruxiwijefor.pdf
    • https://betifutilas.files.wordpress.com/2020/07/67000040334.pdf
    • https://gizofudefin.files.wordpress.com/2020/07/vefejarom.pdf
    • https://wuxegura685470280.files.wordpress.com/2020/06/kixefoselewove.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52945462890.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118cc.bin
e1949e4f16356fc11a4d122f9eb0a989342bf20efc7854b42a67b7d7bbdd2903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118CC 5384 bytes
font_01_sfnt_off00012b30.bin
f17cf1764ebad2ae4591905f4cc18e08d12eea0fdc80566224e8e9636049460d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B30 14148 bytes

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